What should e-commerce platforms improve to ensure higher market shares?

We live in an era where almost anyone can set up online stores. The ease of setting up a website makes online stores so common that it's a struggle to stand out amongst one another. In fact, e-commerce platforms are growing at such a rapid pace that online businesses are all trying to go the extra mile to gain the highest market shares.

In 2015, how would consumers buy their groceries, meals, clothes, stationary and electronic appliance? Many customers will buy via online stores as they are too busy with work and everyday life, there is no time for them to purchase via physical store.